No do not let them do it.
It's already galvanized unless you live near the coast you'll never need it.
If you want DIY use Hammerite Rust Cap and or POR 15 products.
I use Hammerite on the old cars I flip (I buy used POS as a hobby and sell them after fixing a bit).
http://www.masterchem.com/pages/default.aspx?NavID=42
Quote:
Glassguard Protection
As the HAMMERITE Rust Cap coating dries, millions of heat-hardened glass flakes interlock with special resins, forming a super-tough barrier that seals out moisture to prevent rusting.
Paint Right Over the Rust
HAMMERITE Rust Cap paint is a long-lasting coating that can be applied directly over firm, rusty surfaces. With HAMMERITE’S unique paint-right-over-the-rust capability, you achieve a smooth, deep finish, rich in color
|
.